Question

我已经使用feign和hystrix实现了一个关于以下文章的http调用：https://blog.crafties.fr/2017/07/23/setup-a-circuit-breaker-with-hystrix/

我正在使用这些依赖项：

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-openfeign</artifactId>
    <version>2.0.0.M1</version>
    <type>pom</type>
    <scope>import</scope>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-netflix</artifactId>
    <version>2.0.0.M7</version>
    <type>pom</type>
    <scope>import</scope>
</dependency>

我的实现如下：

@FeignClient(name = "someName", 
url = "https://my.url/to/service", fallbackFactory = RTKClientFallbackFactory.class)
public interface RTKClient {

    @PostMapping(value = "/v1/topics/rt/messages")
    KRestProducerResponse sendT(@RequestBody T t);

}


@Component
public class RTKClientFallbackFactory implements FallbackFactory<RTKClient>{

    @Override
    public RTKClient create(Throwable cause) {
        return new RTKClientFallback(cause);
    }
}

public class RTKClientFallback implements RTKClient{

    private final Throwable cause;
    private final static Logger LOG = LogManager.getLogger(RTKClientFallback.class);

    public RTKClientFallback(Throwable cause) {
        this.cause = cause;
    }

    @Override
    public KRestProducerResponse sendTemplate(T t) {
        KRestProducerResponse response = new KRestProducerResponse();
        if (cause instanceof FeignException) {
            response.setStatus(((FeignException)cause).status());
        }
        return response;
    }
}

当我手动测试时，这是有效的。对我来说，问题是对后备单元进行单元测试

这是我尝试的方式：

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
@AutoConfigureWireMock(port = 0)
@EnableCircuitBreaker
@EnableFeignClients
public class RTKClientFallbackTest {

    @Autowired
    public RTKClient client;

    @Rule
    public WireMockRule wireMockRule = new WireMockRule(8089);

    @Test
    public void should_fall_back_with_error_code_in_response() {

        stubFor(get(urlEqualTo("https://my.url/to/service/v1/topics/rt/messages"))
                .willReturn(aResponse().withStatus(404)));
        T t = new T();
        KRestProducerResponse response = client.sendTemplate(t);
        assertEquals(404, response.getStatus());
    }
}

我不明白的是以下几点：

如何链接我的存根和我的FeignClient？（截至目前，我的测试称为真实端点）
如何在此上下文中启用hystrix（如果我让它弄乱了我的网址，我发现它没有使用后备）

欢迎任何想法。谢谢

如何用spring-cloud对hystrix回退进行单元测试

0 个答案: